Question

在Android应用程序中工作，这里我有一个 TimePicker ，带有微调模式，我的布局背景颜色是黑色的。所以我想改变 TimePicker的字体为白色 [小时，分钟，上午/下午]。

我已经从SO中引用并尝试了很多解决方案，但没有解决我的问题。

最后我找到了一个来源Change the text color of NumberPicker

我已实现如下

import java.lang.reflect.Field;

public class CheckOut extends Activity {

 protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_create_alarm);

 mTimePicker = (TimePicker) findViewById(R.id.mTimePicker);
int mycolor = getResources().getColor(R.color.tab_background);
 setTimePickerColor(mTimePicker,mycolor);

}

 public static boolean setTimePickerColor(TimePicker timePicker, int color)
    {
        final int count = timePicker.getChildCount();
        for(int i = 0; i < count; i++){
            View child = timePicker.getChildAt(i);
            if(child instanceof EditText){
                try{
                    Field selectorWheelPaintField = timePicker.getClass()
                            .getDeclaredField("mSelectorWheelPaint");
                    selectorWheelPaintField.setAccessible(true);
                    ((Paint)selectorWheelPaintField.get(timePicker)).setColor(color);
                    ((EditText)child).setTextColor(color);
                    timePicker.invalidate();
                    return true;
                }
                catch(NoSuchFieldException e){
                    Log.w("setNumberPickerTextColor", e);
                }
                catch(IllegalAccessException e){
                    Log.w("setNumberPickerTextColor", e);
                }
                catch(IllegalArgumentException e){
                    Log.w("setNumberPickerTextColor", e);
                }
            }
        }
        return false;
    }
}

我不知道我在哪里犯了错误，因为它没有任何效果。

Answer 1

使用android native date and time picker的问题和缺点。

自定义很难，人们永远不会在日期选择器上花费数小时。

pre lollipop和lollipop设备中的日期和计时器选择器界面变化

<强>解决方案

我总是使用MaterialDateTimePicker库来摆脱这个问题。这个库是高度可定制的，维护良好的仓库。

我正在分享您的基本活动类代码，您可以在基础活动类中添加或创建一个新代码。

您将通过此基类扩展您的活动类。并且只是调用我写的简单方法。

openTimeDialog(Calendar.getInstance(), new OnTimeSelected() {
            @Override
            public void onTimeSet(Calendar timeCalendar) {

            }
        });

<强> BaseProject.java

import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.TimePickerDialog;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;

import java.util.Calendar;

/**
 * Created by KHEMRAJ on 8/1/2017.
 */

public class BaseProject extends Activity {

    public interface OnDateSelected {
        void onDateSet(Calendar dateCalendar);
    }

    public interface OnTimeSelected {
        void onTimeSet(Calendar timeCalendar);
    }

    public void openDateDialog(OnDateSelected onDateSelected) {
        openDateDialog(Calendar.getInstance(), null, null, onDateSelected);
    }

    public void openDateDialog(@NonNull Calendar preSelectedCalendar, final OnDateSelected onDateSelected) {
        openDateDialog(preSelectedCalendar, null, null, onDateSelected);
    }

    public void openDateDialog(@NonNull Calendar preSelectedCalendar, @Nullable Calendar minDateCalander, final OnDateSelected onDateSelected) {
        openDateDialog(preSelectedCalendar, minDateCalander, null, onDateSelected);
    }

    public void openDateDialog(@NonNull Calendar preSelectedCalendar, @Nullable Calendar minDateCalander, @Nullable Calendar maxDateCalander, final OnDateSelected onDateSelected) {
        DatePickerDialog dpd = DatePickerDialog.newInstance(
                new DatePickerDialog.OnDateSetListener() {
                    @Override
                    public void onDateSet(DatePickerDialog view, int year, int monthOfYear, int dayOfMonth) {
                        Calendar calendar = Calendar.getInstance();
                        calendar.set(Calendar.YEAR, year);
                        calendar.set(Calendar.MONTH, monthOfYear);
                        calendar.set(Calendar.DAY_OF_MONTH, dayOfMonth);
                        if (onDateSelected != null) onDateSelected.onDateSet(calendar);
                    }
                },
                preSelectedCalendar.get(Calendar.YEAR),
                preSelectedCalendar.get(Calendar.MONTH),
                preSelectedCalendar.get(Calendar.DAY_OF_MONTH)
        );
        if (minDateCalander != null)
            dpd.setMinDate(minDateCalander);
        if (maxDateCalander != null)
            dpd.setMaxDate(maxDateCalander);
        dpd.show(getFragmentManager(), "Datepickerdialog");
    }

    public void openTimeDialog(@NonNull Calendar preSelectedCalendar, final OnTimeSelected onTimeSelected) {
        TimePickerDialog timePickerDialog = TimePickerDialog.newInstance(
                new TimePickerDialog.OnTimeSetListener() {
                    @Override
                    public void onTimeSet(TimePickerDialog view, int hourOfDay, int minute, int second) {
                        Calendar calendar = Calendar.getInstance();
                        calendar.set(Calendar.HOUR_OF_DAY, hourOfDay);
                        calendar.set(Calendar.MINUTE, minute);
                        calendar.set(Calendar.SECOND, second);
                        if (onTimeSelected != null) onTimeSelected.onTimeSet(calendar);
                    }
                },
                preSelectedCalendar.get(Calendar.HOUR_OF_DAY),
                preSelectedCalendar.get(Calendar.MINUTE),
                false);
        timePickerDialog.show(getFragmentManager(), "TimePickerDialog");
    }

}

添加此依赖项

compile 'com.wdullaer:materialdatetimepicker:3.6.0'

您可以按照link

如何更改TimePicker字体颜色

1 个答案: